K 10 svn:author V 6 scottl K 8 svn:date V 27 2016-11-08T00:24:49.119043Z K 7 svn:log V 212 Convert the Q-Pair and PRP list memory allocations to use BUSDMA. Add a bunch of safery belts and error handling in related codepaths. Reviewed by: jimharris Obtained from: Netflix Differential Revision: D8453 END